Improvement in sand-screens tor iron tube-wells



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Letters Patent No. 101,148, dated fifa/rch 22, 1870.

IMPROVEMENT IN SAND-SCREENS FOR IRON TUBE-WELLS.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern n Be tknown that I, ROBERT M. Moulant, of the town of Plymouth, county of Marshall, and State of Indiana, have invented a new and useful Improvement in Sand-Screens or Filters for Iron and other Tube-Wells; and I do hereby declare that the following is-a full and exact description thereof, reference being had to lthe annexed drawing accompanying the same.

The method of niakingand operating the saule is as follows:

Upon the ordinary gas-pipe or iron tubing A used for wells, strips of tin or any other suitable metal are soldered or otherwise properly fastened, with the edges of the strips bent or turned outward and brought Very closely together, so -closc that particles of sand and dirt cannot work or draw through between the edge of the strips B.

The edgesofthe strips are raised from the tube, and form a triangular cavity, C, extending the whole length of the strips, which may be niade of any re quired length. v

1n the tube small holes or slots are made of any required shape. These holes are to be in the triangular cavity, and to be in rows parail'el with the edges of the strips.

The strips extcudto within a few inches of the lower end of the well-tube, which lower end is stopped with an iron or steel point, D, which point is made larger in its greatest circumference than the circumference of the tube and sand-screen; and when it (the tube) is driven into the ground, the point being'larger thanA the screen, protects it from being bruised or `otherwise injured by the pressure or friction while the well is being sunk. When water is reached, it passes freely through the orifices between the edges of the strips,

thence into the tube through the triangular cavity and holes therein; and the narrowness of the orifice between the edges of the strips prevents the particles of sand or dirt from passing into the tube.

\\"itncsses A. B. Carnon', L. G. Carnon. 

